I'm kinda apprehensive about my GTX 280 because I feel nVidia are going to shrink it down in the next few months and release a card @ 750 on the core. My GTX 280
may slightly pass 700 on the core and I seriously doubt I'll ever approach 750. If this does happen, I'm going to want the new card.
I just located something to support my paranoia
http://techreport.com/discussions.x/14822